This recipe is similar to Jing's Sweet and Sour Pineapple Pork. Sweet and sour pork or shrimp are old Cantonese recipes. Unlike the pork recipe, this shrimp dish does not require marinading. Simply peel and devein the shrimp, dip in the batter, and deep fry in very hot oil. The sweet and sour sauce can be made ahead of time and kept in the refrigerator, simply warm it before serving.The traditional way to serve this dish is to heat the sauce, toss the fried shrimp and pineapple in the sauce to coat, and serve right away. The fried batter will become soggy if the shrimp sit in the sauce for very long. I prefer to serve the sauce in a dish on the side, to be used as a dip. You can also keep the fried shrimp warm in an oven on very low heat (200℉ / 93℃) if you will not serve the dish right away.Adding peppers is optional, and is done to give color contrast to the dish, especially if you toss the shrimp, peppers, and pineapple in the sauce before serving: the red, green, and yellow are very pleasing. After frying the shrimp, blanch the peppers in the hot oil for 5 seconds, then remove them and set aside. Add them to the warm sauce with the pineapple and shrimp just before serving.
Then cut the slices into quarters and cut away the core. Then cut the quarters into bite-sized chunks.
If you are using peppers, rinse and chop the peppers. Remove the inner pulp and seeds. Cut into bite-sized pieces.
Peel and devein the shrimp. To peel the shrimp, cut away the head and abdomen where it meets the tail (if the head is on), then holding the tail with one hand, grasp the flippers along the bottom and pull them around the body to break the shell away.
454 grams medium shrimp
Then gently grasp the tail fins and pull the tail portion of the shell away.
Lay the peeled shrimp on a cutting board, and gently cut along the center line of the back just enough to expose the vein. Then rinse away the vein under cold water.
Heat the wok over high heat. Then fill the wok 1/3 of the way with oil, and heat to 375°F (190° C). While the oil is heating, prepare the sauce and the batter.
470 ml cooking oil for deep-frying
Mix the sauce:
Add the sugar, vinegar, and ketchup to a mixing bowl. Add 250 ml water. Stir until the sugar is dissolved. Set aside.
20 ml white vinegar, 15 ml ketchup, 250 ml water, 25 ml white sugar
Add 15 ml (1 tbsp) corn starch to a bowl, then 45 ml water (3 tbsp), and stir until the starch is dissolved. Set aside
45 ml starch water
Rinse and peel a green onion. Cut away the root, and cut the white part of the green onion from the green leaves. Slice the white part in half, lengthwise, then cut across into 1 inch (25mm) sections. Chop the green portion into small pieces to use as a garnish, and set aside.
1 green onion, white part
Peel and rinse a short section of ginger root, and cut four slices, the thickness of a coin. Julienne the slices. Set aside with the white portion of the green onion.
4 slices fresh ginger
Prepare the batter:
Mix equal parts flour and corn starch. and 10 ml of baking powder. After stirring until there are no lumps, add warm water (25-40°C, 77-104°F) in small amounts and stir well. Then add 5ml cold oil. Stir well.
78 ml flour, 78 ml corn starch, 10 ml baking powder, 5 ml cooking oil, warm water
The batter should not be too thick, but not so thin as water. Test the thickness by coating one piece of shrimp and frying. The batter should coat the shrimp evenly. The cooked shrimp should be slightly crispy and have a nice three-dimensional quality, but not crunchy like fried chicken. If the batter is too thick, add a bit more water. If too thin, add a little more flour and corn starch.
Cooking:
The oil needs to be hot, about 375°F (191℃). If you do not have a thermometer, test the heat by dropping a small amount of batter into the oil. If it foams, the oil is not hot enough. If it sizzles instantly, the oil is hot enough.
470 ml cooking oil for deep-frying
Working in small batches, coat the shrimp with batter and gently drop into the hot oil (be careful not to splash). The shrimp will fry in a few seconds. Stir constantly with a slotted spoon or spider web strainer, then remove.
454 grams medium shrimp
If using peppers, dry-blanch them in the hot oil for 5 seconds, then remove.
1 mild green pepper (Anaheim or bell), 1 mild red pepper (Anaheim or bell)
Drain the oil into a heat-proof container. Wipe any batter residue from the wok.
Make the sauce:
Heat the wok over medium heat.
Add 15m of fresh oil to the pot, add the white part of the green onion and the ginger slices, stirring and tossing to flavor the oil. When you smell the aroma, after about 30 seconds, stir the sauce mixture again briskly, then pour into the the wok. Stirring constantly, bring the sauce to a boil, then add the starch water a little bit at a time to thicken the sauce to desired consistency. Add 5ml of oil to brighten. Stir well. (See Notes below: the goal is to have the sauce coat the meat and other ingredients.)
5 ml cooking oil, 4 slices fresh ginger, 1 green onion, white part, 15 ml cooking oil, 45 ml starch water
If you are going to serve the sauce separately, add the pineapple chunks and peppers (if using) and long enough to warm them, then pour the sauce into a serving bowl. If you are going to serve in the traditional method, add the shrimp, peppers, and pineapple to the sauce. Stir so that the ingredients are evenly coated with the sauce and thoroughly warmed.
454 grams medium shrimp, 1 mild red pepper (Anaheim or bell), ½ pineapple
Transfer to a plate and serve. (Sprinkle with the chopped green onion leaves as an optional garnish, if you prefer.)
Notes
Be careful with hot oil. Keep utensils and hands dry. Water droplets in hot oil will boil instantly, producing steam and causing the hot oil to splatter.
Do not put all the shrimp in the oil at once, or the temperature will drop too low and the batter will soak up the oil. Work in small batches, and allow the oil to return to temperature between batches.
In winter, when the temperature is low, using warm water to prepare the batter can make the flour, cornstarch and baking powder react faster. Make a good batter. If the temperature is not cold, then you can use cold water.
If you don't have fresh pineapple, you can use canned pineapple instead.
For best flavor in the sauce, try to find a good organic ketchup with tomatoes, vinegar, and sugar. Many brands use tomato sauces, high fructose corn syrup, water, etc. They have a ketchup flavor but lack the rich taste of a real ketchup.